Remove redundant gitea workflow job

These steps are executed during the initial deployment

.gitea/workflows/deploy.yaml

@@ -11,15 +11,8 @@ env:
   CONDA: /opt/miniforge3
 
 jobs:
-  prepare:
-    runs-on: pyzebra
-    steps:
-      - run: $CONDA/bin/conda config --add channels conda-forge
-      - run: $CONDA/bin/conda config --set solver libmamba
-
   test-env:
     runs-on: pyzebra
-    needs: prepare
     if: github.ref == 'refs/heads/main'
     env:
       BUILD_DIR: ${{ runner.temp }}/conda_build
@@ -33,7 +26,6 @@ jobs:
 
   prod-env:
     runs-on: pyzebra
-    needs: prepare
     if: startsWith(github.ref, 'refs/tags/')
     env:
       BUILD_DIR: ${{ runner.temp }}/conda_build